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https://issues.apache.org/jira/browse/HADOOP-10840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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shanyu zhao updated HADOOP-10840:
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Attachment: HADOOP-10840.2.patch
> Fix OutOfMemoryError caused by metrics system in Azure File System
> ------------------------------------------------------------------
>
> Key: HADOOP-10840
> URL: https://issues.apache.org/jira/browse/HADOOP-10840
> Project: Hadoop Common
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.4.1
> Reporter: shanyu zhao
> Assignee: shanyu zhao
> Attachments: HADOOP-10840.1.patch, HADOOP-10840.2.patch,
> HADOOP-10840.patch
>
>
> In Hadoop 2.x the Hadoop File System framework changed and no cache is
> implemented (refer to HADOOP-6356). This means for every WASB access, a new
> NativeAzureFileSystem is created, along which a Metrics source created and
> added to MetricsSystemImpl. Over time the sources accumulated, eating memory
> and causing Java OutOfMemoryError.
> The fix is to utilize the unregisterSource() method added to MetricsSystem in
> HADOOP-10839.
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